package com.supply.dl.widget.fr.castorflex.android.smoothprogressbar;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;

/**
 * This is a copy of the ContentLoadingProgressBar from the support library, but extends
 * SmoothProgressBar.
 */
public class ContentLoadingSmoothProgressBar extends SmoothProgressBar
{

	private static final int MIN_SHOW_TIME = 500; // ms
	private static final int MIN_DELAY = 500; // ms

	private long mStartTime = -1;

	private boolean mPostedHide = false;

	private boolean mPostedShow = false;

	private boolean mDismissed = false;

	private final Runnable mDelayedHide = new Runnable()
	{

		@Override
		public void run()
		{
			mPostedHide = false;
			mStartTime = -1;
			setVisibility(View.GONE);
		}
	};

	private final Runnable mDelayedShow = new Runnable()
	{

		@Override
		public void run()
		{
			mPostedShow = false;
			if (!mDismissed)
			{
				mStartTime = System.currentTimeMillis();
				setVisibility(View.VISIBLE);
			}
		}
	};

	public ContentLoadingSmoothProgressBar(Context context)
	{
		this(context, null);
	}

	public ContentLoadingSmoothProgressBar(Context context, AttributeSet attrs)
	{
		super(context, attrs, 0);
	}

	@Override
	public void onAttachedToWindow()
	{
		super.onAttachedToWindow();
		removeCallbacks();
	}

	@Override
	public void onDetachedFromWindow()
	{
		super.onDetachedFromWindow();
		removeCallbacks();
	}

	private void removeCallbacks()
	{
		removeCallbacks(mDelayedHide);
		removeCallbacks(mDelayedShow);
	}

	/**
	 * Hide the progress view if it is visible. The progress view will not be
	 * hidden until it has been shown for at least a minimum show time. If the
	 * progress view was not yet visible, cancels showing the progress view.
	 */
	public void hide()
	{
		mDismissed = true;
		removeCallbacks(mDelayedShow);
		long diff = System.currentTimeMillis() - mStartTime;
		if (diff >= MIN_SHOW_TIME || mStartTime == -1)
		{
			// The progress spinner has been shown long enough
			// OR was not shown yet. If it wasn't shown yet,
			// it will just never be shown.
			setVisibility(View.GONE);
		}
		else
		{
			// The progress spinner is shown, but not long enough,
			// so put a delayed message in to hide it when its been
			// shown long enough.
			if (!mPostedHide)
			{
				postDelayed(mDelayedHide, MIN_SHOW_TIME - diff);
				mPostedHide = true;
			}
		}
	}

	/**
	 * Show the progress view after waiting for a minimum delay. If
	 * during that time, hide() is called, the view is never made visible.
	 */
	public void show()
	{
		// Reset the start time.
		mStartTime = -1;
		mDismissed = false;
		removeCallbacks(mDelayedHide);
		if (!mPostedShow)
		{
			postDelayed(mDelayedShow, MIN_DELAY);
			mPostedShow = true;
		}
	}
}
